Snow and Ice Response

Public Works is responsible for approximately 1,600 total miles of county-maintained roads. In order to provide an optimum level of service over such a large area during snow and ice events, routes have been designated by priority. Routes are prioritized based on traffic volume, transit and school bus routes, terrain, and institutional knowledge of historical problem areas.

View a map of the Snohomish County priority snow and ice removal routes.

Please be advised the road priority list does not change based on public calls requesting service. Additionally, multiple requests for service will not increase the priority of the response.

Snowplowing and Sanding


Public Works’ Road Maintenance crews will make every effort to clear steep access roads and lower priority residential roadways in heavily populated areas, but only as resources allow. Higher priority routes may require plowing several times a day depending on the conditions and severity of the event.

Reminders:
  • Give snowplows plenty of room to work. Do not tailgate and if you must pass, take extreme caution and beware of the displaced snow and ice, and sand when the sander is on.
  • Vehicles parked along all major arterials and emergency routes must be removed off the street.
  • Keep drainage inlets near your home clear of leaves and debris during the winter months to help reduce the chance of flooding.

Ice


Road Maintenance traditionally uses sand and salt to treat black ice or frost that has accumulated on roadways.

For our more challenging areas, however, Road Maintenance takes a preventative approach by using anti-icing spray over the road to prevent ice from forming or sticking. The spray solution used is more effective at maintaining a bare and wet road surface. Anti-icing is more costly than sand and salt, so it is used sparingly and only on pre-designated primary or historically troublesome routes.

Check Commute Routes Before Traveling on Roadways


During weather events please check your commute options before venturing out.

  • Snohomish County Road Closures (list and map).
    • State routes and highways are maintained by the Washington State Department of Transportation (WSDOT) and are NOT reflected on the Snohomish County Road Closure webpage. Call 511 or visit WSDOT's website for more information.
  • Transit (Community Transit, Sound Transit, Everett Transit, King County Metro Transit, Skagit Transit, Island Transit) – Transit services may be rerouted for safety in some areas with no advance notice.

​Additional Resources


  • Snohomish County Road Closure Inquiries/Updates: 425-388-7500.
    • Work requests for road plowing will be recorded, but will not impact the priority listing during snow and ice events.
  • WSDOT webcams: Real-time conditions from various points along area highways.
  • Life-threatening emergencies: Call 911.
  • Non-life threatening emergencies: 
    • For Brier, Edmonds, Woodway, Lynnwood, Mill Creek, Mountlake Terrace, and Mukilteo call 425-775-3000. 
    • For the rest of Snohomish County, dial 425-407-3999.
  • Human Services related needs including shelters and some food needs: 211.